Open D Slide Pinch Patterns Two – is an 8 measure exercise with the unique effect of a constant pairing of the middle and ring fingers combined with a series of pinch patterns on the picking hand. A strict steadiness is required as the slide travels one to two frets at a time up the neck of the guitar. 12 string players will notice the special effect this series of patterns has on, specifically the 3rd and 4th strings when plucked with the thumb or (p).